Michigan, Indiana, and Maryland Suffrage Research

Newspapers:

Hoosier State Chronicles, Indiana's statewide historical newspaper project 

Digital Michigan Newspapers

Newspapers.com -  Much stronger in Indiana than the others. 

 Chronicling America  -  Better for Maryland than the others. 

Early American Newspapers, 1690-1922 - Mostly 19th Century includes African American Newspapers.  

Other Sources:

Ancestry.com: for census and other genealogical information 

Find a Grave for gravestone (and other) information 

Women and Social Movements in the United States: 1600 to 2000

 Books:

Via Hathi Trust    

History of Woman Suffrage Vol. 6 / by NAWSA, e.d. Ida Husted Harper - This volume of the multi volume set includes chapters on each state

History of Suffrage in Michigan / by Mary Joice Adams

Via  Dissertations & Theses Global

Some aspects of the woman suffrage movement in Indiana / by L. Alene Sloan.

Maryland women and the transformation of politics, 1890s-1930 / by Diane Weaver